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The gut microbiome contributes to optimal vaccination efficacy. (A) Timeline of antibiotic treatment and immunization; (B) concentrations of serum anti-SARS-CoV-2 spike IgG. Each dot = one animal, with squares indicating control mice and triangles indicating antibiotic-treated mice. p < 0.001 (one-way ANOVA). Ctrl: control mice treated with water instead of antibiotics in the same way. *** indicates p < 0.001.
